Micromedex DrugNotes [Internet]. Truven Health Analytics; 1974-2016.

Morphine, Slow Release (By mouth)

Morphine (MOR-feen)

Treats moderate to severe pain. This medicine is a narcotic pain reliever.

Brand Name(s)

AVINza, Kadian, MS Contin

There may be other brand names for this medicine.

When This Medicine Should Not Be Used

This medicine is not right for everyone. Do not use it if you had an allergic reaction to morphine, codeine, hydrocodone, dihydrocodeine, or oxycodone, or if you have severe lung or breathing problems or paralytic ileus.

How to Use This Medicine

Long Acting Capsule, 24 Hour Capsule, Long Acting Tablet

Take your medicine as directed. Your dose may need to be changed several times to find what works best for you. An overdose can be dangerous. Follow directions carefully so you do not get too much medicine at one time. Swallow the extended-release tablet whole. Do not crush, break, or chew it. Do not take any tablet that is chipped or broken. Swallow the extended-release capsule whole. Do not crush, break, or chew it. If you cannot swallow the extended-release capsule, you may open it and pour the medicine into a small amount of applesauce. Stir this mixture well and swallow it without chewing. Morphine extended-release capsules or tablets work differently from the regular morphine tablets, even at the same dose. Do not switch from one form to the other unless your doctor tells you to. This medicine should come with a Medication Guide. Ask your pharmacist for a copy if you do not have one. Missed dose: If you miss a dose of this medicine, skip the missed dose and take your next dose at your usual time the next day. Do not double doses. Store the medicine in a closed container at room temperature, away from heat, moisture, and direct light. Store the medicine in a safe and secure place. Do not throw unused medicine in the trash. Ask your pharmacist about the best way to dispose of medicine you do not use.

Drugs and Foods to Avoid

Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.

Some medicines can affect how morphine works. Tell your doctor if you are also using any of the following:

Cimetidine Quinidine A diuretic (water pill) A phenothiazine medicine An MAO inhibitor (MAOI) within the past 14 days Do not drink alcohol while you are using this medicine. Tell your doctor if you use anything else that makes you sleepy. Some examples are allergy medicine, narcotic pain medicine, and alcohol. Tell your doctor if you are also using buprenorphine, butorphanol, nalbuphine, pentazocine, or a muscle relaxer.

Warnings While Using This Medicine

Tell your doctor if you are pregnant or breastfeeding, or if you have kidney disease, liver disease, heart disease, low blood pressure, breathing problems or lung disease (such as asthma or COPD), gallbladder problems, pancreas problems, an enlarged prostate, trouble urinating, or stomach or bowel problems. Tell your doctor if you have a history of head injury, brain tumor, depression, seizures, or alcohol or drug abuse. This medicine may cause the following problems:

High risk of overdose, which can lead to death Respiratory depression (serious breathing problem that can be life-threatening) This medicine can be habit-forming. Do not use more than your prescribed dose. Call your doctor if you think your medicine is not working. Do not stop using this medicine suddenly. Your doctor will need to slowly decrease your dose before you stop it completely. This medicine may make you dizzy, drowsy, or lightheaded. Do not drive or do anything else that could be dangerous until you know how this medicine affects you. Sit or lie down if you feel dizzy. Stand up carefully. This medicine may cause constipation, especially with long-term use. Ask your doctor if you should use a laxative to prevent and treat constipation. Keep all medicine out of the reach of children. Never share your medicine with anyone.

Possible Side Effects While Using This Medicine

Call your doctor right away if you notice any of these side effects:

Allergic reaction: Itching or hives, swelling in your face or hands, swelling or tingling in your mouth or throat, chest tightness, trouble breathing Blue lips, fingernails, or skin Extreme dizziness or weakness, shallow breathing, slow or uneven heartbeat, sweating, cold or clammy skin, seizures Severe confusion, lightheadedness, dizziness, fainting Severe constipation, stomach pain, or vomiting Trouble breathing or slow breathing

If you notice these less serious side effects, talk with your doctor:

Mild constipation, nausea, or vomiting Mild sleepiness or tiredness

If you notice other side effects that you think are caused by this medicine, tell your doctor.

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.